23321020221 has 6 divisors (see below), whose sum is σ = 33685918110. Its totient is φ = 15547346808.

The previous prime is 23321020187. The next prime is 23321020231. The reversal of 23321020221 is 12202012332.

23321020221 is a `hidden beast` number, since 233 + 210 + 2 + 0 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13122848025 + 10198172196 = 114555^2 + 100986^2 .

It is not a de Polignac number, because 23321020221 - 2¹⁸ = 23320758077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23321020194 and 23321020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321020231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1295612226 + ... + 1295612243.

It is an arithmetic number, because the mean of its divisors is an integer number (5614319685).

Almost surely, 2^23321020221 is an apocalyptic number.

It is an amenable number.

23321020221 is a deficient number, since it is larger than the sum of its proper divisors (10364897889).

23321020221 is a wasteful number, since it uses less digits than its factorization.

23321020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591224475 (or 2591224472 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23321020221 its reverse (12202012332), we get a palindrome (35523032553).

The spelling of 23321020221 in words is "twenty-three billion, three hundred twenty-one million, twenty thousand, two hundred twenty-one".